#include<stdio.h>
int t;
// #define swap(a,b) {int t=a;a=b;b=t;}

void __inline swap(int a,int b)
{
    int t=a;
    a=b;
    b=t;
}

int main()
{
    int a=1,b=2;
    printf("a=%d b=%d\n",a,b);
    swap(a,b);
    printf("a=%d b=%d\n",a,b);
    return 0;
}